Hypania invalida

Distribution: PA Habitat: LR, ES, SL Comments: This species has been particularly successful in colonising various types of fresh and brackish water habitats in Europe. It is one of four ponto-caspian species belonging to Hypania or related genera including H. antiqua, which is often considered to be a junior synonym of H. invalida; the group is in need of revision. Additional references: Birula (1897), Dershawin (1910), Annenkova (1929 a, 1929 b, 1930), Wesenberg-Lund (1958), Mordukhai-Boltovskoi (1964), Weber (1964), Gerlach (1978), Nagy (1979), Manoleli (1977, 1980), Tarasov (1996), Vanden Bossche et al. (2001), Bij de Vaate et al. (2002), Khlebovich (2004), Devin et al. (2006)